lh28f008sc Sharp Microelectronics of the Americas, lh28f008sc Datasheet - Page 14

• Manufacturer Part Number: lh28f008sc
• Description: 8m 1m ? 8 Flash Memory
• Manufacturer: Sharp Microelectronics of the Americas

LH28F008SC
14
FULL STATUS CHECK PROCEDURE
CHECK IF DESIRED
STATUS REGISTER
BLOCK ADDRESS
BLOCK ADDRESS
READ STATUS
BLOCK ERASE
BLOCK ERASE
FULL STATUS
SUCCESSFUL
COMPLETED
WRITE D0H
WRITE 20H
REGISTER
(see above)
SR.4, 5 =
START
SR.7 =
SR.3 =
SR.1 =
SR.5 =
DATA
0
0
0
0
1
0
1
1
1
1
BLOCK ERASE
SUSPEND
ERASE?
NO
SEQUENCE
BLOCK
V
COMMAND
PROTECT
PP
DEVICE
ERROR
ERROR
ERROR
ERROR
RANGE
SUSPEND BLOCK
Figure 6. Automated Block Erase Flowchart
ERASE LOOP
YES
Repeat for subsequent block erasures.
Full status check can be done after each block erase or
after a sequence of block erasures.
Write FFH after the last operation to place
device in read array mode.
SR.5, SR.4, SR.3 and SR.1 are only cleared by the Clear Status
Register Command in cases where multiple blocks are erased
before full status is checked.
If error is detected, clear the Status Register before attempting
retry or other error recovery.
OPERATION
OPERATION
Standby
Standby
Standby
Standby
Standby
Read
Write
Write
BUS
BUS
COMMAND
COMMAND
Confirm
Erase
Setup
Erase
Data = 20H
Addr = Within block to be
erased
Data = D0H
Addr = Within block to be
erased
Status Register Data
Check SR.7
1 = WSM Ready
0 = WSM Busy
Check SR.3
1 = V
Check SR.1
1 = Device Protect Detect
RP = V
Only required for systems
implemening lock-bit
configuration
Check SR.4, 5
Both 1 = Command Sequence
Error
Check SR.5
1 = Block Erase Error
8M (1M × 8) Flash Memory
PP
IH
Low Detect
COMMENTS
COMMENTS
Block Lock-Bit is Set
28F008SC-6